That’s down to different reasons: 1. You can still reuse the binary blobs that make up the drivers. 2. Android has unlockable bootloaders whereas iPhones do n

That’s down to different reasons: 1. You can still reuse the binary blobs that make up the drivers. 2. Android has unlockable bootloaders whereas iPhones do not. However the binary blobs are not always legally redistributable or even reusable. They don’t also help if you need to support any version of the kernel other than what shipped in case there’s any ABI differences